DSA-661-2 f2c -- insecure temporary files

Dan McMahill noticed that our advisory DSA 661-1 did not correct
the multiple insecure files problem, hence, this update. For
completeness below is the original advisory text:

Javier Fernández-Sanguino Peña from the Debian Security Audit project
discovered that f2c and fc, which are both part of the f2c package, a
fortran 77 to C/C++ translator, open temporary files insecurely and
are hence vulnerable to a symlink attack. The Common
Vulnerabilities and Exposures project identifies the following
vulnerabilities: